gistfile1.js

function render(SomeElement, state) {
  if (typeof window === 'undefined') {
    let htmlMarkup = React.renderToString(React.createElement(SomeElement, state))
    return Iso.render(htmlMarkup, state, { id: 'hello' })
  } else {
    Iso.on('id', 'hello', function (state, meta, node) {
      React.render(React.createElement(SomeElement, state), node)
    })
  }
}